CN216210461U - Composite reflective projection screen - Google Patents

Abstract

The utility model provides a compound reflective projection screen, contain a supporting layer, a first leaded light layer, a second leaded light layer, a plurality of reflectance coatings and an absorption layer, first leaded light layer, the supporting layer, second leaded light layer and absorption layer are arranged according to the preface, second leaded light layer has a plurality of microprism units that possess the slope plane of reflection respectively, and these a plurality of plane of reflection intervals set up, each plane of reflection is located respectively to the reflectance coating, when the compound reflective projection screen projection of this application of projector, the leaded light unit can be with light to both sides dispersion, with the homogeneity of promotion light, and promote the definition of the image of both sides, and effectively increase the scope of watching, the reflectance coating can be with the light reflection from the incident of slope direction to the place ahead, with the luminance that increases the image, and see through reflectance coating and absorption layer in order to form light and shade contrast, effectively promote the definition of image.

Description

Composite reflective projection screen

Technical Field

The present invention relates to a composite reflective projection screen, and more particularly, to a composite reflective projection screen capable of reflecting light uniformly.

Background

With the advance of science and technology, people can watch television programs, films or data through a display, and can also project images onto a blank wall surface by using a projector, wherein the projector projects the images to a front projection area in a mode of emitting light rays by a light source arranged inside, and when the projection area of the projector is opposite to the wall surface, the images can be projected onto the wall surface so that a viewer can watch the images on the wall surface.

The high-reflection projection screen can reflect light better than the brightness of a common wall surface, so that a viewer can view a clear image through the high-reflection projection screen, but when the light of the surrounding environment irradiates the high-reflection projection screen, the image displayed on the high-reflection projection screen is affected, the definition and the contrast of the image are reduced, and therefore, the projector needs to emit light with strong brightness to project the image, and the image on the high-reflection projection screen can be prevented from being interfered by the light in the environment.

However, as shown in fig. 11, since the light emitted from the projector 90 is intensively projected on the center of the high reflection projection screen 80, and the light reflected by the high reflection projection screen 80 is not uniform, when the brightness of the light is strong, a bright area 81 is formed at the center of the high reflection projection screen 80, which affects the viewing effect, and causes the brightness at the two side portions of the high reflection projection screen 80 to be low and the image to be blurred, so that the image on the high reflection projection screen 80 is not easily seen clearly by the viewers at the two sides of the high reflection projection screen 80, and the viewing angle of the high reflection projection screen 80 provided by the viewers is narrow.

In addition, as shown in fig. 12, since the high reflection projection screen 80 is perpendicular to the ground when installed, and the incident angle to the light is approximately equal to the reflection angle, when the projector 90 placed on the table or the ground projects the light from the lower front side of the high reflection projection screen 80, and the light is reflected from the high reflection projection screen 80, a part of the light is reflected upward, and a bright band 91 is formed on the ceiling, so that the projected light cannot be effectively utilized, and the brightness of the high reflection projection screen 80 is affected, and therefore, the high reflection projection screen still has room for improvement.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a composite reflective projection screen, and it is desirable to improve the problems of the existing high-reflective projection screen, such as poor uniformity of reflected light, narrow viewing angle, and poor viewing effect of the high-reflective projection screen due to the inability of the projector to effectively utilize the projected light when projecting light from the front lower side of the high-reflective projection screen.

To achieve the above object, the present invention provides a hybrid reflective projection screen defining a first axial direction, a second axial direction and a third axial direction perpendicular to each other, the third axial direction having a light incident side and a back side opposite to each other, the hybrid reflective projection screen comprising:

a support layer;

the first light guide layer is positioned on the light incident side of the supporting layer and comprises a plurality of light guide units which are arranged at intervals along the second axial direction, each light guide unit comprises a main column body and two side column bodies, the two side column bodies are oppositely arranged on two sides of the main column body, and the main column body and the two side column bodies can refract light;

the second light guide layer is positioned on the back side of the supporting layer and is provided with a plurality of micro prism units which are arranged along the first axial direction, the plurality of micro prism units are respectively provided with a reflecting surface, the reflecting surfaces are obliquely arranged relative to the first axial direction, and the reflecting surfaces of the plurality of micro prism units are arranged at intervals;

a plurality of reflecting films, each reflecting film is formed on the reflecting surface of each micro prism unit;

the light-transmitting structure is formed on the second light guide layer and the back sides of the plurality of reflecting films, and the back side of the light-transmitting structure is a plane; and

an absorption layer formed on the back side of the light-transmitting structure.

The compound reflective projection screen of this application can be used for supplying a projector projection, the light of projector can refract when penetrating this first leaded light layer, can be reflected when the microprism unit that kicks into this second leaded light layer and reach these a plurality of reflectance coatings, and the user can pass through compound reflective projection screen watches the image.

Wherein, compound reflective projection screen has following advantage:

1. the uniformity of the reflected light can be improved: through the structural design of the plurality of light guide units, when the projector projects light from the light inlet side to the first light guide layer, the plurality of light guide units can refract and disperse light concentrated at the central part of the composite reflective projection screen, so that when the light is reflected by the plurality of reflecting films, the light can be dispersed to the two side parts of the composite reflective projection screen, the uniformity of the light can be effectively improved, the uniformity of the light is improved, the brightness of the light at the two side parts of the composite reflective projection screen is improved, the definition of the displayed image can be improved, and the range of the viewing angle of a user is increased.

2. The contrast of the image can be improved: through the design that the reflecting films are respectively arranged on the reflecting surfaces arranged at intervals, and the absorbing layer is positioned on the back side of the reflecting films, when light is emitted to the reflecting films, the light can be reflected, when the light is emitted to a position between two adjacent reflecting films, most of the light can be absorbed by being projected to the absorbing layer, so that the light and shade difference of the light is generated, the contrast of an image presented by the composite reflective projection screen can be improved, and the absorbing layer can also absorb ambient light so as to improve the definition of the image watched by a user.

3. The brightness of the image can be improved: when the projector is right when compound reflective projection screen throws light, the plane of reflection through these a plurality of microprism units is the structural design that the slope set up, and this a plurality of reflectance coatings can be incited from the incline direction the light of plane of reflection to compound reflective projection screen's the place ahead reflection, consequently can avoid light reflection to other places, and can effectively utilize light to increase the luminance of the image that presents, and can promote the definition of the image that the user watched, promote user's viewing experience.

Drawings

Fig. 1 is a partial perspective view of a composite reflective projection screen according to a first preferred embodiment of the present invention.

FIG. 2 is a top plan view of a hybrid reflective projection screen according to a first preferred embodiment of the present invention.

Fig. 3 is a schematic top plan view of a first embodiment of a light guide unit of a composite reflective projection screen according to the present application.

Fig. 4 is a schematic top plan view of a second embodiment of a light guide unit of a composite reflective projection screen according to the present application.

Fig. 5 is a partially enlarged schematic plan view of a first light guide layer of the composite reflective projection screen according to the present application.

FIG. 6 is a schematic side plan view of a hybrid reflective projection screen according to a first preferred embodiment of the present invention.

FIG. 7 is a schematic side plan view of a composite reflective projection screen according to a second preferred embodiment of the present invention.

Fig. 8 is a schematic diagram of a distribution of reflected light of the hybrid reflective projection screen according to the present application.

Fig. 9A is a schematic view of a light guiding unit of the composite reflective projection screen according to the present application, which refracts light rays distributed in a central portion of the present application.

Fig. 9B is a schematic view of light rays refracted by the light guide unit distributed on the left part of the center of the composite reflective projection screen of the present application.

Fig. 9C is a schematic view of light rays refracted by the light guide unit distributed at the left portion of the composite reflective projection screen of the present application.

Fig. 10 is a schematic view illustrating light reflected by a reflective film of the hybrid reflective projection screen according to the present application.

FIG. 11 is a schematic diagram of a conventional high-reflection projection screen for forming a bright area in the central portion of the projection screen when the projection screen is projected by a projector.

Fig. 12 is a schematic diagram of a conventional high-reflection projection screen for reflecting light to a ceiling to form a bright band when a projector projects light.

Detailed Description

Referring to fig. 1 to 7, there are shown various preferred embodiments of a composite reflective projection screen according to the present application, which define a first axial direction D1, a second axial direction D2 and a third axial direction D3 perpendicular to each other, where the third axial direction D3 has a light incident side and a back side opposite to each other, and the composite reflective projection screen includes a support layer 10, a first light guide layer 20, a second light guide layer 30, a plurality of reflective films 40 and an absorption layer 50.

In addition, for convenience of describing the composite reflective projection screen, six directions of upper, lower, left, right, front and rear are indicated in the drawing, and the first axis D1 is parallel to the upper and lower directions; the second axial direction D2 is parallel to the left-right direction; the third axial direction D3 is parallel to the front-to-back direction, and the light inlet side is in front; the back side is at the rear, wherein the material of the supporting layer 10, the first light guide layer 20 and the second light guide layer 30 can be transparent or semitransparent and can transmit light, and the supporting layer 10, the first light guide layer 20 and the second light guide layer 30 can be made of the same base material.

As shown in fig. 1 and fig. 2, the first light guiding layer 20 is located on the light incident side of the supporting layer 10 and includes a plurality of light guiding units 21 arranged at intervals along the second axial direction D2, each light guiding unit 21 includes a main pillar 22 and two side pillars 23, the two side pillars 23 are disposed opposite to each other on two sides of the main pillar 22, and the main pillar 22 and the two side pillars 23 can refract light.

As shown in fig. 3 to 5, the main cylinder 22 of the light guiding units 21 has a light guiding surface 221, the light guiding surface 221 is located on the light incident side of the main cylinder 22, the light guiding surface 221 is arc-shaped, and the surface of the light guiding surface 221 is rough, preferably, the light guiding surface 221 is arc-shaped and has a radius of less than or equal to 40 μm.

In addition, as shown in fig. 3 and 4, the side pillars 23a,23b of the light guide units 21 have a bottom surface 231, a side light guide surface 232 and a connection surface 233 connected in sequence, the bottom surface 231 of the side pillars 23a,23b is located on the support layer 10, the side light guide surface 232 can be arc-shaped or planar, a first included angle θ 1 is formed between the connection surface 233 and the bottom surface 231, and the side light guide surface 232 and the connection surface 233 can be rough surfaces.

As shown in fig. 3, when the side light guide surface 232 is a cambered surface, the side column 23a is a column with a cambered surface, and preferably, the side light guide surface 232 is a cambered surface, and the radius is less than or equal to 40 μm; as shown in fig. 4, when the side light guide surface 232 is a plane, the side column 23b is a triangular column.

In addition, on the supporting layer 10, the light guiding units 21 comprising the side pillars 23a or the light guiding units 21 comprising the side pillars 23b can be arranged adjacently or discontinuously.

As shown in fig. 5, a spacing distance can be formed between every two adjacent light guide units 21, and the spacing distance between every two adjacent light guide units 21 can be equal or unequal, for example, the length of the spacing distance L1 is not equal to the length of the spacing distance L2, and the spacing distance can be changed along with the position change of the adjacent light guide units 21 on the composite reflective projection screen, and the change form of the spacing distance can be equal difference, unequal difference, equal ratio or unequal ratio.

As shown in fig. 3 to 5, the first included angle θ 1 of the side pillars 23a and 23b is preferably in a range from 60 degrees to 90 degrees, and includes endpoints, and the first included angle θ 1 of the side pillars 23a and 23b of the light guide units 21 can be changed along with the position change of the light guide units 21 on the composite reflective projection screen.

As shown in fig. 1, 6 and 7, the second light guiding layer 30 is located on the back side of the supporting layer 10, and has a plurality of micro prism units 31 arranged along the first axis D1, each of the plurality of micro prism units 31 has a reflection surface 311, the reflection surfaces 311 of the plurality of micro prism units 31 are arranged at intervals and are inclined with respect to the first axis D1, and the plurality of micro prism units 31 can be arranged at intervals or adjacent to each other and can be designed as an integral body.

Each micro prism unit 31 has a base surface 312 and a top surface 313, the base surface 312 is located on the support layer 10, a second included angle θ 2 is formed between the reflection surface 311 and the base surface 312 of each micro prism unit 31, the top surface 313 is connected to the reflection surface 311, and the top surface 313 can be connected to the reflection surface 311 of the adjacent micro prism unit 31, preferably, the angle range of the second included angle θ 2 is between 5 degrees and 40 degrees, inclusive.

Furthermore, the second included angles θ 2 of the micro-prism units 31 can change with the position of the micro-prism units 31 on the composite reflective projection screen, and in the preferred embodiment of the present application, as shown in fig. 10, the second included angles θ 2 of the micro-prism units 31 gradually increase from bottom to top.

As shown in fig. 1, 6 and 7, each reflective film 40 is formed on the reflective surface 311 of each micro-prism unit 31, preferably, the reflective film 40 is formed on a part of the reflective surface 311, a part of the reflective surface 311 without the reflective film 40 is defined as an absorption region 314, the absorption region 314 is adjacent to the top surface 313 of another micro-prism unit 31, the reflective film 40 is made of a reflective material and can be coated or adhered on the micro-prism unit 31, and when light is emitted to the reflective films 40 on the reflective surface 311 of the micro-prism unit 31, the light is reflected.

As shown in fig. 1, 2, 6 and 7, a light-transmitting structure 51 is formed on the back sides of the second light-guiding layer 30 and the plurality of reflective films 40, the back side of the light-transmitting structure 51 is a plane, the shape of the light-transmitting structure 51 on the light-incident side corresponds to the reflective surfaces 311 and the top surface 313 of the plurality of microprism units 31 and the plurality of reflective films 40, an absorbing layer 50 is formed on the back side of the light-transmitting structure 51 and is spaced apart from the plurality of reflective films 40 along the third axial direction D3, the absorbing layer 50 can absorb light, and preferably, the absorbing layer 50 is made of a black material to improve the effect of absorbing light.

In addition, as shown in fig. 7, in the second preferred embodiment of the present application, the composite reflective projection screen can include a protection layer 60, wherein the protection layer 60 is disposed on the backside of the absorption layer 50.

The composite reflective projection screen of the present application can provide a projector 70 to project in a manner of projecting light, and can present images, the light projected by the projector 70 can be refracted by penetrating through the first light guide layer 20, at this time, a part of the light can be reflected by the light guide unit 21, and a part of the light can pass through the micro prism units 31 of the support layer 10 and the second light guide layer 30, and can be reflected by the plurality of reflective films 40 on the reflective surface 311 of the micro prism units 31, so that a user can view images through the composite reflective projection screen.

As shown in fig. 8, when the light emitted from the projector 70 enters the light guiding units 21 of the first light guiding layer 20 from the light incident side, the light is refracted by the plurality of light guiding units 21, and a part of the light is reflected, wherein the light guiding units 21 receive light of different angles along with different positions on the present application, and the light generates different refraction and reflection paths, and the main column 22 and the side column 23 of one light guiding unit 21 also refract and reflect the light in different directions, so that for convenience of explaining the influence of the light guiding units 21 at different positions on the light path, the region where the light is emitted from the light incident side of the present application is sequentially defined as a left region C, a left front region B, a central region a, a right front region D, and a right region E from left to right.

Referring to fig. 9A, the light guide unit 21 is located at the central portion of the present application, as shown in fig. 8 and 9A, when light is emitted to the light guide unit 21, the main cylinder 22 can refract the light incident on the main light guide surface 221 and emit the light to the central area a; the side column 23 located at the left side of the light guide unit 21 can emit the light incident on the side light guide surface 232 to the left front section B and emit the light incident on the connection surface 233 to the right section E; the side column 23 located at the right side of the light guide unit 21 can emit the light incident on the side light guide surface 232 to the right front section D and emit the light incident on the connection surface 233 to the left section C.

Referring to fig. 9B, the light guiding unit 21 is located at the left part of the center of the present application, as shown in fig. 8 and 9B, when the light is emitted to the light guiding unit 21, the main cylinder 22 can refract the light incident on the main light guiding surface 221 and emit the light to the left front section B; the side cylinder 23 located on the left side of the light guide unit 21 can make the light incident on the side light guide surface 232 exit to the central section a and the left front section B, and the side cylinder 23 located on the right side of the light guide unit 21 can make the light incident on the connection surface 233 exit to the left section C.

Referring to fig. 9C, for the light guide unit 21 located at the left part of the present application, as shown in fig. 8 and 9C, when light is emitted to the light guide unit 21, the main cylinder 22 can refract the light incident on the main light guide surface 221 and emit the light to the left section C, the side cylinder 23 located at the left side of the light guide unit 21 can emit the light incident on the side light guide surface 232 to the left front section B and the right section E, and the side cylinder 23 located at the right side of the light guide unit 21 can emit the light incident on the side light guide surface 232 to the left front section B.

In addition, in the preferred embodiment of the present application, as shown in fig. 8, since the light guiding units 21 of the present application are distributed symmetrically left and right, the light guiding unit 21 at the right part of the center generates a path symmetrical to the light guiding unit 21 at the left part of the center; the light guide unit 21 located at the right part can enable light to generate a path symmetrical to the light guide unit 21 at the left part, and therefore, the light can be evenly dispersed to the central interval a, the left front interval B, the left interval C, the right front interval D and the right interval E of the light incidence side of the light guide device through the structure and distribution position design of the light guide units 21, the definition of the displayed image can be improved, and the viewing angle range of a user can be effectively enlarged.

In addition, as shown in fig. 8 and fig. 9A to 9C, in the preferred embodiment of the present application, the first included angles θ 1 of the side cylinders 23 of the light guide units 21 increase from the center to the left and right sides, and the angle of the first included angle θ 1 of the light guide unit 21 located at the center of the present application is smaller, i.e., closer to 60 degrees; the first included angle θ 1 of the light guide unit 21 located on the left side is larger, that is, closer to 90 degrees; the first included angle θ 1 of the side pillar 23 of the light guide unit 21, which is located on the left side of the center, is centered, and the light reflected by the composite reflective projection screen has better uniformity due to the change of the first included angle θ 1 when the light guide unit 21 is located at different positions.

As shown in fig. 10, when the light of the projector 70 is projected to the composite reflective projection screen from an oblique direction, and penetrates through the supporting layer 10 and enters the micro-prism units 31 of the second light guiding layer 30, the light is reflected by the plurality of reflective films 40 on the reflective surfaces 311 of the plurality of micro-prism units 31, and the light is emitted forward through the structural design of the micro-prism units 31, so as to improve the reflective effect of the light, thereby effectively increasing the brightness and uniformity of the image displayed by the composite reflective projection screen, and improving the definition of the image viewed by the user, so as to improve the viewing experience of the user.

In the preferred embodiment of the present invention, when the projector 70 is located below the front side of the composite reflective projection screen, the second included angle θ 2 between the reflective surface 311 and the base surface 312 of the micro-prism unit 31 is gradually increased from the lower side to the upper side, and the reflective films 40 are respectively located on the reflective surfaces 311 of the micro-prism units 31, so that by the design of the angle change of the second included angle θ 2, when the light projected by the projector 70 enters the reflective surfaces 311 of the micro-prism units 31, the reflective films 40 can respectively reflect the light in different incident directions to the front side, so as to further improve the brightness of the image.

In addition, as shown in fig. 6, by the design that the reflective film 40 is only located on a part of the reflective surface 311, the part of the reflective surface 311 without the reflective film 40 forms the absorption region 314, when the light is incident on the absorption region 314 of the reflective surface 311, the light passes through the light-transmitting structure 51 and is absorbed by the absorption layer 50; when the light is projected to the reflective film 40, the light is reflected, so that a difference between light and shade can be formed, the contrast of an image presented by the composite reflective projection screen is improved, and the definition of the image can be effectively improved.

Moreover, when light is projected from the top of the light incident side to the composite reflective projection screen in the environment of the present application, the ambient light is projected to the top surfaces 313 of the plurality of microprism units 31 and passes through the light-transmitting structure 51, and is absorbed by the absorption layer 50 on the back side of the light-transmitting structure 51, thereby reducing the influence of the ambient light on the image presented in the present application, and effectively improving the definition of the image.

In addition, in the second preferred embodiment of the composite reflective projection screen of the present application, the composite reflective projection screen can be hung on a wall for use, at this time, the protection layer 60 can be used to protect the absorption layer 50 so as to prevent the absorption layer 50 from being affected by friction with the wall, and when the composite reflective projection screen is rolled up for storage, the protection layer 60 can separate the first light guide layer 20 and the absorption layer 50, thereby preventing the first light guide layer 20 and the absorption layer 50 from being affected by mutual friction.

To sum up, the compound reflective projection screen of this application can supply the user to pass through projector 70 projection and watch the image, the light guide unit 21 of this first leaded light layer 20 can be with the light of throwing to both sides dispersion to promote the homogeneity of light, and can promote the definition that is located the image of both sides and effectively increase the viewing range, reflecting surface 311 through the slope setting of these a plurality of microprism units 31, these a plurality of reflectance coatings 40 can be with the light of incidence to the place ahead from the incline direction, in order to promote user's eyes can received light, this absorbed layer 50 can absorb light and form the light and shade contrast with these a plurality of reflectance coatings 40, and can absorb ambient light, borrow this, compound reflective projection screen can effectively promote user's the experience of watching.

Claims (9)

1. A composite reflective projection screen defining a first axial direction, a second axial direction, and a third axial direction perpendicular to each other, the third axial direction having an incident light side and a backside opposite to each other, the composite reflective projection screen comprising:

a support layer;

the first light guide layer is positioned on the light inlet side of the supporting layer and comprises a plurality of light guide units which are arranged at intervals along the second axial direction, each light guide unit comprises a main column body and two side column bodies, the two side column bodies are oppositely arranged on two sides of the main column body, and the main column body and the two side column bodies can refract light;

the second light guide layer is positioned on the back side of the supporting layer and is provided with a plurality of micro prism units which are arranged along the first axial direction, the micro prism units are respectively provided with a reflecting surface, the reflecting surfaces are obliquely arranged relative to the first axial direction, and the reflecting surfaces of the micro prism units are arranged at intervals;

a plurality of reflecting films, each reflecting film is formed on the reflecting surface of each micro prism unit;

the light-transmitting structure is formed on the second light guide layer and the back sides of the plurality of reflecting films, and the back side of the light-transmitting structure is a plane; and

an absorbing layer formed on the back side of the light-transmitting structure.

2. A compound reflective projection screen according to claim 1, wherein the main columns of the plurality of light directing units have a light guiding surface, the light guiding surface being located at the light incident side of the main columns, the light guiding surface being arc-shaped.

3. A composite reflective projection screen according to claim 2, wherein said main light guide surface is a circular arc surface with a radius of 40 microns or less.

4. A composite reflective projection screen according to claim 1, wherein the side pillars of the light guide units have a bottom surface, a side light guide surface and a connecting surface connected in sequence, the bottom surface of the side pillars is located on the supporting layer, the side light guide surface can be arc-shaped or planar, and a first angle is formed between the connecting surface and the bottom surface.

5. A compound reflective projection screen according to claim 4, wherein the first included angle is in the range of 60 degrees to 90 degrees, inclusive.

6. A composite reflective projection screen according to any of claims 1 to 5, comprising a protective layer disposed on the back side of the absorbing layer.

7. A composite reflective projection screen according to any of claims 1 to 5, wherein each of the microprism units has a base surface and a top surface, the base surface is disposed on the support layer, a second angle is formed between the reflective surface and the base surface of each microprism unit, and the top surface is connected to the reflective surface.

8. A compound reflective projection screen according to claim 7, wherein the second included angle is in the range of 5 degrees to 40 degrees inclusive.

9. A compound reflective projection screen according to any of claims 1 to 5, wherein the reflective film is formed on part of the reflective surface, the part of the reflective surface without the reflective film being defined as an absorbing region.

Images